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dmavar.h revision 1.4 
      1 /*	$NetBSD: dmavar.h,v 1.4 1999/04/08 04:46:41 gwr Exp $ */
      2 
      3 /*
      4  * Copyright (c) 1994 Peter Galbavy.  All rights reserved.
      5  * Redistribution and use in source and binary forms, with or without
      6  * modification, are permitted provided that the following conditions
      7  * are met:
      8  * 1. Redistributions of source code must retain the above copyright
      9  *    notice, this list of conditions and the following disclaimer.
     10  * 2. Redistributions in binary form must reproduce the above copyright
     11  *    notice, this list of conditions and the following disclaimer in the
     12  *    documentation and/or other materials provided with the distribution.
     13  * 3. All advertising materials mentioning features or use of this software
     14  *    must display the following acknowledgement:
     15  *	This product includes software developed by Peter Galbavy.
     16  * 4. The name of the author may not be used to endorse or promote products
     17  *    derived from this software without specific prior written permission.
     18  *
     19  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
     20  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
     21  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
     22  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
     23  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
     24  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
     25  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
     26  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
     27  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
     28  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
     29  */
     30 
     31 struct dma_softc {
     32 	struct device sc_dev;			/* us as a device */
     33 	struct ncr53c9x_softc *sc_esp;		/* my scsi */
     34 	volatile struct dma_regs *sc_regs;	/* the registers */
     35 	int	sc_active;			/* DMA active ? */
     36 	u_int	sc_rev;				/* revision */
     37 	int	sc_burst;			/* DVMA burst size in effect */
     38 	caddr_t	sc_dvmakaddr;			/* DVMA cookies */
     39 	caddr_t	sc_dvmaaddr;			/*		*/
     40 	u_long  sc_dmasaddr;			/* Slave address */
     41 	size_t	sc_dmasize;
     42 	caddr_t	*sc_dmaaddr;
     43 	size_t  *sc_dmalen;
     44 #if 0
     45 	void (*reset)(struct dma_softc *);	/* reset routine */
     46 	int (*intr)(struct dma_softc *);	/* interrupt ! */
     47 	int (*setup)(struct dma_softc *, caddr_t *, size_t *, int, size_t *);
     48 #endif
     49 };
     50 
     51 #define DMACSR(sc)	((sc)->sc_regs->csr)
     52 #define DMADDR(sc)	((sc)->sc_regs->addr)
     53 #define DMACNT(sc)	((sc)->sc_regs->bcnt)
     54 
     55 struct dma_softc * espdmafind __P((int));
     56 
     57 void dma_reset __P((struct dma_softc *));
     58 int  dma_setup __P((struct dma_softc *, caddr_t *, size_t *, int, size_t *));
     59 
     60 int espdmaintr __P((struct dma_softc *));
     61